Smoke-consuming furnace.



J. G. GRAGEY & B. B. SQUIER. SMOKE GONSUMING FURNACE. APPLICATION FILED MAR. l1 1912.

2 SHEETS-SHEET 1.

W1 TNESSES: IN VENTORS James G flr acey 7 A M QM BY Edi-570m- ATTORNEY.

Patented Dec. 31, 1912.

2 SHEETS-SHEET 2.

J. G, GRAOEY & 'B'. E. SQUIBR.

APPLIGATIO more srnrns nrnivr error.

JAMES G. GRACEY AND EDWARD E. SQUIER, OF ST. LOUIS, MISSOURI, ASSIGNORS TO ED. E. SQUIER COMPANY, OF EAST ALTON, ILLINOIS, A CORPORATION OF ILLINOIS.

SMOKE-CONSUMING FURNACE.

Specification of Letters Patent.

Application filed March 11, 1912'. Serial No. 682,982.

consists in the novel features of construction more fully set forth in the specification and pointed out in the claims.

In the drawings, Figure 1 is acombined vertical middle longitudinal section of the furnace and side elevation the boiler; Fig. 2 .is a vertical transverse action on the line 22 of Fig. 1; Fig. 3 is :1V vertical transverse section on the line 33 of Fig. 1'; Fig. l is a vertical transverse secti n on the zigzag line hl of Fig. 1;-and Fig. 5 is a horizontal section on the line 55 of Fig. 1.

The present invention though eminently adapted to be used in connection with boiler furnaces, is not necessarily restricted thereto in its application, a boiler pr, steam generator being however, herein selected to illus-- trate one mode of applying the invention.

The object of the invent-ionis to provide a furnace employing any character of fuel wherein every available combustible element of such fuel shall be consumed, so that smoke shall be entirely'eliminated and perfect combustion assured.

Broadly speaking the invention contemplates a return of a part of the combustion products (only partially consumed) from the rear combustion chamber or the chamber beyond the bridge wall, back to a point in the region of a zone of complete combustion contiguous to the bridge wall, said zone being created by the accession of fresh air to the products escaping from the fire-box over the bridge-wall and passing under the.

boiler shell. The confluence of. the two cur rents results in so thorough an interminglingof the returned products with the highly heated gases and air flowing from over the bridge-wall, as to completely consome every vestige of material not pro viou'sly thoroughly oxidized.

In detail the invention may. lee-describedas follows: Referring to the drawings, A represents a furnace, B a conventional cylinder flue-boiler, C the fire-box, D the bridge-wall, G the grate, and E the. rear or secondary combustion chamber, and P the ash pit, all'as fully understood in the art. Disposed rearwardly of the bridgewall, and at a convenient distance there- Patenteol Dec. 31, 1912.

from at the front end of the combustion chamber E, is a partition or division wall 1 partially surrounding the boiler shell B, said wall having fornied therein an arched opening or passage 2 preferably extending to the furnace floor at the bottom, and a short distance from the'shell at the crown of the arch defining the opening. The front edge or corner 2 of the opening at the arch is preferably rounded so that the gases may better dip into the opening past said corner. Formed in the bridge-wall opposite the ashpit P (the door a of which shouldbe left open to freely admit atmospheric air under the grate) is an air induction opening or passage 3, the air drafted through said opening being discharged into a compart- I 'ment or air-flue 4 between the bridge-wall and a transverse wall 5 spaced 2. suitable Y distance from the 'bridgewall as shown. Between the wall or partition 5 and the division wall 1 is a second transverse wall 6 spaced 2. suitable distance from both the wall 5 and wall 1, and occupying a substantially central position between them. There is thus formed a compartment or gas flue 7 bet-ween'the walls 5 ments 4. and 7 being contiguous to one another and separated by the wall 5. Communication between the compartment 7 andcombustion chamber E is established through the large opening 2 in the wall 1, and a series of openings or passages 8 formed in the wall 6, the precise elevation or distance of the passages 8 above the floor of the furnace being best determined for each furnace,' but they should be low enough so as not to interfere with the gases deflected,

or dipping down from. the corner 6, and yethigh enough to serve their purpose in directing a portion. of the products from the chamber 'E into the compartment 7 for a purpose presently to appear. the walls D, 5 and 6, which are of the same height, are surmounted by a plate 9 having openings "or passage-ways 10, ll, opposite Preferably,

and 6, said compartthe compartments 4: and 7 respectively, to allow 01" a free outlet of the gases from said compartments into the space between said ple' and the boiler shell.

The operation ilie fuiiiace is substantially as follows .ll1e combustion products pass from the firebox reerwe'rdly over the bridge-Well as usual, but the present instance they receive on accession of fresh air drafted from the ash-pit P through the into the compartment e, the letter ing the air at the too of said comm (through the openi s 10 Where a och. as 9 is employed}, The air cue rents inns iiidiiced "l1 the opening 3 into the compartment e supply an excess of lzo oxidize sl'icvffs'i by the arrows, w t-lie corner 6 oi the arch o: ilie' l, dipping down erd 'it' veling ieei'vzei'd to the 1 encounter .e peeing 2 in. said comer flow and as it discler es from moulli the compaclmen; fl; 1; indu upward current in the comeesrlm l. current supplied by lillfi gases from L chamber l5, 2. portion of Wlllilll 1" opem g cement i @ectively, is nemoosl slated co'cy en such excess o 1 v and all. once. 51.

v "rents 14G coin oerlme ing the compartment '5,

I V v J traversed by EUROS here; an end the la or by gases co fining xhlec'ly con-s1 718G:

products of combus\:..on returned thereto "E. The top from the combustion chamber 01, ihe Well 1 1s give-tween the gel he bail ion of general current which is charged with an excess of oxygen as already described. The result is that very little or no smoke is formed, the furnace being practically a perfect smoke consumer.

The construction lieie shown may be employed in stoves, ranges, and the like, and in lieu of fire-lilies, cast iron me" be en'iployed in forming the various partitions and walls which give rise 'te the several lines.

The Wall 1 as S1101} is not absolutelv necessary, the effective portion being; the upper portion above the arch of the opening 2 e. Hen serves as deflecting Wall, causing the cases to die down Any partition or Wall iherei'ore depending a, suitable distance below the shell B, so es lo cause the gases to (lip, Will serve the purposeof the wall 1.

, H, represent hsnddmoles for cleaning the combustion chamber and'seveml flees.

lilsviiig escribed our invention, whet We claim is:

in a furnace provided with e, fire-box, secondary con'ibustion chamber and a. bridgeevall, boiler, a division Well posilioned at the front end of said chamber and spaced i ffilll the bi'idge-Well, and extending to the 013151, said division Well being provided Wise an opening the top of which depressed a suitable distance from the boiler, transverse Well rearward of and spaced from the bridge-well and forming an air fl e therewith, the bridge Well being pro- '-*d with. 21-13 opening below the fire box for conducting air into said i'lue, e second parallel Wail rearward of and spaced from the first ecansveise wall. and positioned in will oi the division Wall aforesaid end .LQl'nillilg 21 line wi said transverse Wall, d second wall i1 openings opposite of the division ell, the said openings being ositioned a suitable distance below the $0 of the opening in the division well, the portion of the letter Wall elween the opening thereof and the boiler ising the gases to dip toward the combus lion chamber, and the llues aforesaid discharging into the products of combustion as they pass over ilie bridge-Wall.

in effuziiece prvided with e fire-box, secondary combustion chamber, and e bridgewell, a boiler, a transverse Wall reae of and spaced from the bridgewell and fo. fine contiguous thereto, the bridge-Well being provided with openings for edmitl-ing fresh air into said. due, a sec ond transverse-Well rearward of and spaced frem clie first Well we forming a flue C011- iiguous thereto, a transverse deflecting Well depending elow the boiler rearward ofthe "econd 'tcmfeiv se Well and spaced the-re ,Z'Ol'fl said eii ceiidiiig below the upper edge eiieoi for ceusine' the gases to dip tom c 1 6. 3 e seconded coii'ilms'tion cliemiiei',-the secme. wall being provided with openings below the-botfom ef said deflecting In testimony whereef we aflix our sigwall for returning a portion of the gases natures, inpresence of two wltnesses.

i'rom .the secondary combustion chamber into a JAMES G; GRAGEY.

the second flue aforesaid, the respective flues EDWARD E. SQUIER.

' and the fire-box discharging mto the space I Witnesses:

between the boiler and the bridge-wall and EMIL Smflk; transverse Walls respectively; v I Joe. A. MICHEL.

['opies of; thls'patent may be obtained for five dents eah, addressing the Commissioner of .Pafents,

v Washington, D. 0. v 

